![]() ![]() The results showed that using the SPH model, the un-bonding zone and coating profile were simulated with high accuracy without any need to determine the plastic strain criterion required for the ALE model. A comparison was also performed between the results predicted by the SPH and Arbitrary Lagrangian-Eulerian (ALE) models. The predicted results were compared and validated with the experimental results. ![]() Using the Smoothed Particle Hydrodynamics (SPH) model, this article has studied the thermomechanical and microstructural aspects of AA6061 aluminum coating applied by friction surfacing. Additionally, the outcome acquired by such computational technique illustrate that the shear strain decrease with increase in channel and corner angle. From the observed results, it was found that the minimum channel angle produces the maximum temperature profile on the material, develop maximum stress and strain at deformation zone. The results concern to the extru-sion load, developed stresses, effectivestrain and temperature variation on the processed material were noted obtained. The ECAP process was simulated for a single ECAP pass. Simulation was done on different channel angles such as 90º, 105º, 120º and 135º and corner angles such as 0º, 10º, 20º and 30º. To understand the process/die design parameter, 3D FEM simulation is done on ECAP process using DEFORM-3D software. In the present work, AA2024 alloys is used, which is a demanding material in aircraft structure and automotive applications. Computer simulation is one of the best alternative of actual ECAP deformation to know the influence of each processing parameters on end results. Some urgent problems to be solved at this stage are discussed and solutions are put forward, which can provide references for in-depth research in the future.Įqual Channel Angular Pressing (ECAP) is one of the most innovative Severe Plastic Deformation (SPD) methods used for grain refinement of materials up to ultra-fined or Nano structured level which leads to superior mechanical properties. Finally, the development trend of ECAP process for preparing ultrafine grained magnesium alloy and its application prospect in the field of commercial manufacturing are introduced. At the same time, the principle of grain refinement and texture modification in ECAP is also discussed On the other hand, this paper summarizes the research progress of ECAP numerical simulation in analyzing the influence of ECAP process parameters on strain distribution uniformity, damage prediction, texture evolution and ductile fracture behavior. It is pointed out that the influences of grain refinement and texture evolution on mechanical properties such as strength, superplasticity and anisotropy must be considered comprehensively. The research results in recent ten years are summarized, including the principle and improvement method of ECAP process, plastic deformation mechanism of magnesium alloy, microstructure characteristics, texture evolution and mechanical properties of ultrafine grained magnesium alloy prepared by ECAP. ![]() ![]() In this paper, the research status of equal channel angular pressing (ECAP) in the preparation of ultrafine grained magnesium alloy is introduced. The test results well match the simulation results. From the damage perspective, the maximum damage values of the inside specimen obtained by the SPH method and the finite element method are both less than 0.16, with both values being far lower than the critical fracture accumulated damage value. The average equivalent strain value of the specimen in the major deformation area is 1.31, which is similar to the finite element simulation result in which the average equivalent strain value of the major deformation area is 1.24. In simulation of pure magnesium during ECAP at room temperature using industrial pure iron as the canned material, the simulation results based on SPH method show that the plastic deformation of the pure magnesium specimen is homogeneous in both the vertical direction and the extrusion direction. In this study, based on SPH (Smooth Particle Hydrodynamics), we utilize the invalid particles and crack treatment techniques, building an ECAP mathematical model incorporating damage prediction, in order to simulate crack initiation and dynamic extension in the ECAP process. At present, most simulation studies of ECAP are conducted based on the finite element method, in which large deformation can cause serious mesh distortion, resulting in a decrease of the simulation accuracy. In the ECAP processing of can, the specimen is canned with a protection material layer to avoid the cracking during deformation. ECAP (Equal Channel Angular Pressing) is a well-known technique by which a specimen is pressed into an ECAP die to improve the mechanical properties by the nearly pure shear during the deformation process. ![]()
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